Abstract:
We compare two different frameworks which have been proposed to include the η′ in chiral perturbation theory. The equivalence of these two approaches is shown both for the purely mesonic case and in the presence of the ground state baryon octet. The relation between the different sets of parameters in both Lagrangians is clarified.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 3 November 1999 / Revised version: 10 January 2000
Rights and permissions
About this article
Cite this article
Borasoy, B. The η′ and the topological charge density . EPJ A 7, 255–259 (2000). https://doi.org/10.1007/PL00013605
Issue Date:
DOI: https://doi.org/10.1007/PL00013605